Picnic backpack



FIG. 1 is a front and top perspective view of a picnic backpack, showing my new design;

FIG. 2 is a rear and bottom perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a right side elevation view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof;

FIG. 9 is an enlarged view of a portion of the picnic backpack indicated with numeric 9 in FIG. 1 ; and,

FIG. 10 is an enlarged view of a portion of the picnic backpack indicated with numeric 10 in FIG. 1 .

The broken lines in the figures illustrate portions of the picnic backpack that form no part of the claimed design. The dash dot dash lines in FIGS. 1, 9 and 10 are for the purpose of depicting the cut line of the enlarged views and form no part of the claim. 

CLAIM The ornamental design for a picnic backpack, as shown and described. 